Procedure for replacing DUW NodeB with dual DUW.pdf

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Procedure for replacing DUW – NodeB with dual DUW
Method of Procedure
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Table of contents
1
2
2.1
2.2
2.3
3
3.1
3.2
Description…….. ......................................................................................................... 3
Prerequisites…............................................................................................................ 3
Document……… ......................................................................................................... 3
Tools…………… ......................................................................................................... 3
Conditions……… ........................................................................................................ 4
Procedure……… ......................................................................................................... 4
Replace DUW – NodeB with Dual DUW (StandbyReady DUW faulty) ........................ 4
Replace DUW – NodeB with Dual DUW using copy /c and /d (Active DUW faulty ) .... 8
Method of Procedure
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Description
This instruction describes procedures for replacing DUW without opening flash
card and make warranty seal broken.
There are 2 method can be use for replacing DUW in NodeB with dual DUW :
1. Replace DUW – NodeB with Dual DUW (StandbyReady DUW faulty)
2. Replace DUW – NodeB with Dual DUW using copy /c and /d (Active DUW
faulty )
All above procedures are executed from a PC/laptop that has serial and Ethernet
connections to the node. The node does not have to be operational, but at least
the DUW must be free from hardware faults.
This procedure base on OPI 119/1543-CRX 901 49/1 Uen N with additional of
some screenshots of each step to make this document easy to be understand
and to minimize human error.
2
Prerequisites
2.1
Document
Emergency Restoring a Configuration Version Backup (119/1543-CRX 901 49/1
Uen N)
2.2
Tools
 Serial cable (IND 2040457 / M3) => direct connection
 Ethernet cable (RPM 901 110 / M3) => direct connection
 LAN cable => Ethernet via APP
 RJ45 to serial cable => serial via APP
 Serial to USB converter
 Screwdriver Torx 8
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2.3
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Conditions
Before starting this procedure, ensure that the following conditions are available:
No
Items to be prepared
Responsibility
1
Amos / Element Manager
NOC / FOP
2
SecureCrt/Putty/Hyperterminal for
serial connection
FOP
3
Procedure
3.1
Replace DUW – NodeB with Dual DUW (StandbyReady DUW faulty)
When replacing a faulty DU, the replacement DU must have the same capacity as
the faulty DU.
Note: It is not recommended to have any basic CV installed in the new DU, to
avoid using the wrong CV for configuration.
If one of the DUs is replaced in a dual DU configuration, the node identity does
not change
Note: It is recommended to change only one DU at a time, to avoid reconfiguring
the RBS and to minimize RBS downtime
Do! Keep the DU not to be replaced, switched on and leave all cables
connected to it during the procedure. Unplug the cables only from the DU to
be replaced to avoid inserting the Inter-DU Link-cable (IDL) in the wrong
direction.
1.
Lock the DU to be replaced.
2.
Switch OFF the power to the DUW to be replaced using on / off button on the
Power Distribution Unit (PDU) corresponding to the DUW.
3.
Disconnect all cables from the DU to be replaced.
4.
Replace the DUW with a new DUW.
5.
Put back all cables except “IDL” cable
6.
Switch ON the power to the DUW newly replaced using on / off button on the
Power Distribution Unit (PDU) corresponding to the DUW
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Connect using serial cable
- DB9 connector on serial cable to COM1 of the client / laptop.
- RJ-45 connector on serial cable to LMT A port (DUW 20 01or DUW 30 01)
or to LMT port (DUW 41 01)
8.
9.
Use any software for terminal emulation in the PC, for example Windows
HyperTerminal/ SecureCrt/Putty, and configure it for communication over
COM1 with the following parameters:
a.
baud rate = 9600 bits per second
b.
parity = none
c.
stop bits = 1 bit
d.
data bits = 8 bits
e.
flow control = none / XON/XOFF
In the communication window of the terminal emulation software, click OK or
press Enter
10. The $ prompt is shown indicating that a serial connection to the DU is
established
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11. Enter backup mode by using command “reload --”
12. Verify that the /c2 volume is mounted, using the command vols /c2.
If the /c2 volume is not mounted, mount the volume, using the command:
mount_c2.
Example volume is not mounted:
Execute command mount_c2
Result:
13. Use command “vols”
14. Please pay attention that in backup mode /c will become /c2 but /d will
remain /d
15. Format the /c2 disk using the command formathd /c2
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16. Format the /d disk using the command formathd /d
17. Use command “reload”
18. Plug-in the Inter-DU Link-cable (IDL) to new DUW.
19. Turn Off and then Turn On both DUW.
20. New DUW will restore automatically / synchronizing
21. Check the result from existing DUW by Connect using Eth connection (RJ-45
cable) LMT B port (DUW 20 01 and DUW 30 01) or to LMT port (DUW 41 01)
22. Use the Element Manager or AMOS to
faultTolerantCoreStates on MO ManagedElement.
check
the
state
of
The already configured DUW has state Active.
The new DU has state PassiveNotReady during the restore procedure. This
can take several minutes.
The new DU has state PassiveReady when the restore procedure is finished.
23. Unlock the new DU
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24. Check the optical indicators; check the indicator status and ensure that all
configured hardware is functional
25. Check the alarm list using the RBS EM and verify that there are no alarms
indicating DU problems
3.2
Replace DUW – NodeB with Dual DUW using copy /c and /d (Active
DUW faulty )
When replacing a faulty DU, the replacement DU must have the same capacity as
the faulty DU.
Note: It is not recommended to have any basic CV installed in the new DU, to
avoid using the wrong CV for configuration.
If one of the DUs is replaced in a dual DU configuration, the node identity does
not change
Note: It is recommended to change only one DU at a time, to avoid reconfiguring
the RBS and to minimize RBS downtime
Do! Keep the DU not to be replaced, switched on and leave all cables
connected to it during the procedure. Unplug the cables only from the DU to
be replaced to avoid inserting the Inter-DU Link-cable (IDL) in the wrong
direction.
Method of Procedure
Public
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1.
When the Active DUW is faulty [ totally down ], ensure that we already copy
the /c & /d configuration stored on StandbyReady DUW before we perform
the DU replacement .
2.
Connect laptop to StandbyReady using Ethernet connection ( LMT B ) and
then copy /c and /d using Ftp application.
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3.
Lock the DU to be replaced.
4.
Switch OFF the power to the DUW to be replaced using on / off button on the
Power Distribution Unit (PDU) corresponding to the DUW.
5.
Disconnect all cables from the DU to be replaced.
6.
Replace the DUW with a new DUW.
7.
Put back all cables except “IDL” cable
8.
Switch ON the power to the DUW newly replaced using on / off button on the
Power Distribution Unit (PDU) corresponding to the DUW
9.
Connect using serial cable
- DB9 connector on serial cable to COM1 of the client / laptop.
- RJ-45 connector on serial cable to LMT A port (DUW 20 01or DUW 30 01)
or to LMT port (DUW 41 01)
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10. Use any software for terminal emulation in the PC, for example Windows
HyperTerminal/ SecureCrt/Putty, and configure it for communication over
COM1 with the following parameters:
a.
baud rate = 9600 bits per second
b.
parity = none
c.
stop bits = 1 bit
d.
data bits = 8 bits
e.
flow control = none / XON/XOFF
11. In the communication window of the terminal emulation software, click OK or
press Enter
12. The $ prompt is shown indicating that a serial connection to the DU is
established
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13. Enter backup mode by using command “reload --”
14. Verify that the /c2 volume is mounted, using the command vols /c2.
If the /c2 volume is not mounted, mount the volume, using the command:
mount_c2.
Example volume is not mounted:
Execute command mount_c2
Result:
15. Use command “vols”
16. Please pay attention that in backup mode /c will become /c2 but /d will
remain /d
17. Format the /c2 disk using the command formathd /c2
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18. Format the /d disk using the command formathd /d
19. Use command “reload”
Now the New DUW is empty and ready to used.
20. Connect the laptop to the Ethernet port ( LMT B ) on the new DUW.
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21. Copy the /c and /d to from laptop to new DUW.
22. Plug-in the Inter-DU Link-cable (IDL) to new DUW.
23. Reload the working DUW to trigger the synchronization between both DUW.
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24. New DUW will restore automatically / synchronizing
25. Check the result from existing DUW by Connect using Eth connection (RJ-45
cable) LMT B port (DUW 20 01 and DUW 30 01) or to LMT port (DUW 41 01)
26. Use the Element Manager or AMOS to
faultTolerantCoreStates on MO ManagedElement.
check
the
state
of
The already configured DUW has state Active.
The new DU has state PassiveNotReady during the restore procedure. This
can take several minutes.
The new DU has state PassiveReady when the restore procedure is finished.
27. Unlock the new DU
28. Check the optical indicators; check the indicator status and ensure that all
configured hardware is functional
29. Check the alarm list using the RBS EM and verify that there are no alarms
indicating DU problems